exportfs (8)
maintain list of NFS exported file systems
SYNOPSIS
/usr/sbin/exportfs [-avi] [-o options,.. ] [ client:/path ..]
/usr/sbin/exportfs -r [-v]
/usr/sbin/exportfs [-av] -u [ client:/path ..]
/usr/sbin/exportfs [-v]
DESCRIPTION
The
exportfs
command is used to maintain the current table of exported file systems for
NFS. This list is kept in a separate file named
/var/lib/nfs/xtab
which is read by
mountd
when a remote host requests access to mount a file tree, and parts of
the list which are active are kept in the kernel's export table.
Normally this
xtab
file is initialized with the list of all file systems named in
/etc/exports
by invoking
exportfs -a .
However, administrators can choose to add and delete individual file systems
without modifying
/etc/exports
using
exportfs .
Any export requests which identify a specific host (rather than a
subnet or netgroup etc) are entered directly into the kernel's export
table as well as being written to
/var/lib/nfs/xtab .
Further, any mount points listed in
/var/lib/nfs/rmtab
which match a non host-specific export request will cause an
appropriate export entry for the host given in
rmtab
to be entered
into the kernel's export table.
OPTIONS
-a
Export or unexport all directories.
-o options,...
Specify a list of export options in the same manner as in
exports(5) .
-i
Ignore the
/etc/exports
file, so that only default options and options given on the command
line are used.
-r
Reexport all directories. It synchronizes /var/lib/nfs/xtab
with /etc/exports. It removes entries in /var/lib/nfs/xtab
which are deleted from /etc/exports, and remove any entries from the
kernel export table which are no longer valid.
-u
Unexport one or more directories.
-v
Be verbose. When exporting or unexporting, show what's going on. When
displaying the current export list, also display the list of export
options.
DISCUSSION
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